A)Ask Dr. Smith to alter his decision.
B)Ask Dr. Smith to call the library.
C)Get the book directly from Dr. Smith.
D)Get Dr. Smith's written permission.
原文：
M:May I take this book out? I need it work on my paper for Dr.Smith’s history class.
W:I’m afraid not. The book has been put on reserve by Dr.Smith. Unless you have his written permission, we won’t lend it out.
Q:what should the man do to borrow the book?